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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter16 Configuring Tag Switching and MPLS
Configuring Tag Switching
IP tagging enabled
TSP Tunnel tagging not enabled
Tagging operational
MTU = 4470
ATM tagging: Tag VPI range = 5 - 6, Control VC = 6/32
<information deleted>
Configuring TDP Control Channels (Optional)
Although not necessary for most configurations, you can change the de fault Tag Distribution Protocol
(TDP) control channel VPI and virtual channel identifier (VCI) if you want to use a nondefault value.
The default TDP control channel is on VPI 0 and VCI 32. TDP control channels exchange TDP HELLOs
and Protocol Information Elements (PIEs) to establish two-way TDP sessions. TVCs are created by the
exchange of PIEs through TDP control channels.
To change the TDP control channel, perform the following steps, beginning in global configuratio n
mode:
Figure 16-1 shows an example TDP control channel configuration between a source switch a nd
destination switch on ATM interface0/0/1. Note that the VPI and VCI values match on the source switch
and destination switch.
Figure16-1 Configuring TDP Control Channels
Examples
In the following example, a TDP control channel is configured on the source switch:
Switch(config)# interface atm 0/0/1
Switch(config-if)# ip address 1.2.0.11 255.255.255.0
Switch(config-if)# tag-switching ip
Switch(config-if)# tag-switching atm control-vc 6 32
Switch(config-if)# exit
In the following example, a TDP control channel is configured on the destination switch:
Switch(config)# interface atm 0/0/1
Command Purpose
Step1 Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Enters interface configuration mode on the
specified ATM interface.
Step2 Switch(config-if)# ip address ip-address mask Assigns an IP address and subnet mask to the
ATM interface.
Step3 Switch(config-if)# tag-switching ip Enables tag switching of IPv4 packets.
Step4 Switch(config-if)# tag-switching atm control-vc
vpi vci
Changes the TDP control channel.
VPI = 6
VCI = 32
VPI = 6
VCI = 32
0/0/1
Source switch Destination switch
S6806